A former rodeo rider turned physical fitness trainer from Mead, CO pitches his workout program that teaches people how to exercise in their heart rate zone; a couple from Narberth, PA want to turn their traveling, custom fitted disco van that's used to throw dance parties for kids into a big money operation; and two friends from Greensburg, PA hope the Sharks will agree with their claim that their cell phone case design is indeed damage proof. In a follow up segment, Raven Thomas from Gilbert, AZ gives an update on the Painted Pretzel, which Mark Cuban invested in during Season 3.